Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
trung cap » truong cao, trung tam
dung cong » dung trong
hanh cham » thanh pham, hanh lam, hanh nam
doc hieu » toc thieu, hoc thieu, hoc hien
cong san » cong tac
san hanh » san thanh, ban hanh, van hanh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - thanh ((dung cho) or (trung cap)) dung cong san hanh cham~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh ((dung cho) OR (trung cap)) dung cong san hanh cham*.